Experimental Investigation of an Eight Qubit Unit Cell in a Superconducting Optimization Processor

Details Experimental Investigation of an Eight Qubit Unit Cell in a Superconducting Optimization Processor Experimental Investigation of an Eight Qubit Unit Cell in a Superconducting Optimization Processor

2010-04-09

arxiv.org/abs/1004.1628v2

Phys. Rev. B 82, 024511 (2010)

Physics

Condensed Matter

Superconductivity

16 pages, 12 figures. Expanded data analysis as compared to version 1

Scientific paper

A superconducting chip containing a regular array of flux qubits, tunable interqubit inductive couplers, an XY-addressable readout system, on-chip programmable magnetic memory, and a sparse network of analog control lines has been studied. The architecture of the chip and the infrastructure used to control it were designed to facilitate the implementation of an adiabatic quantum optimization algorithm. The performance of an eight-qubit unit cell on this chip has been characterized by measuring its success in solving a large set of random Ising spin glass problem instances as a function of temperature. The experimental data are consistent with the predictions of a quantum mechanical model of an eight-qubit system coupled to a thermal environment. These results highlight many of the key practical challenges that we have overcome and those that lie ahead in the quest to realize a functional large scale adiabatic quantum information processor.

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